PhysicsConsider the diagram shown below of a stationary 8 kg mass suspended from the ceiling by two inextensible ropes Draw a scale diagram
February 4, 2015

chemistryWhich of the following is true regarding the solubility of gases in liquids? Question 4 options: Solubility decreases as temperature increases. Solubility increases as temperature increases. Solubility is unaffected by changes in temperature. None of the above
October 30, 2014

biomechanicsDuring a biceps curl, the elbow's relative angle during flexion changes from 3° to 157°. During an 8 repetition set, what is the total angular distance and displacement at the elbow in degrees and radians?
June 30, 2014

PhysicisAirplane staring from airport a flies 300 km east then 395 km 26.5 degrees west of north, and then 150 km north to arrive at airport b. what angle is the straight flight from a to b north of east and how far
October 2, 2013

CalculusA manufacturer produces bolts of fabric with a fixed width. The quantity q of this fabric (measured in yards) that is sold is a function of the selling price p (in dollars per yard), so we can write q = f(p).Then the total revenue earned with selling price p is R(p) = pf(p)....
March 13, 2013

CalculusA rectangular storage container with an open top is to have a volume of 10m^3. The length of its base is twice the width. Material for the base costs $3 per m^2. Material for the sides costs $10.8 per m^2. Find the dimensions of the container which will minimize cost and the ...
March 6, 2013

CalculusThe owner of a used tire store wants to construct a fence to enclose a rectangular outdoor storage area adjacent to the store, using part of the side of the store (which is 220 feet long) for part of one of the sides. (See the figure below.) There are 430 feet of fencing ...
March 4, 2013

MathIf i have 3 inch squares cut out the corners of a rectangular shaped piece of cardboard...after folding the the to form a box the length is twice as long as it is wide and has a volume of 1350 cubic inces...what are the dimensions
February 20, 2013

calculusFind the values of p for which the following series is convergent. The sum from n=2 to infinity of 1/(n(ln(n))^p). I tried the integral test using u-substitution, and I know the answer is p>1, but I'm not quite sure how to get there. Thanks for the help.
February 10, 2013

CalculusProve that the integral from 0 to 2 of sqrt(4-x^2)dx = pi Should I use a trip substitution for this? Thanks for the help.
November 5, 2012

CalculusUse implicit differentiation to find dy/dx. e^4x = sin(x+2y). This is a practice problem. It says the correct answer is 4e^x/(2sin(x+2y)) but I keep getting 4e^(4x)/(2cos(x+2y)). I thought the derivative of e^(4x) would be 4e^(4x), not 4e^(x). And I use chain rule on sin(x+2y...
October 6, 2012

calculusSuppose f'(x) = xe^-x^2. a) On what interval is f increasing? On what interval is f decreasing? b) Does f have a maximum value? Minimum value? So should I assume that f'(x) > 0 since e has to be a positive number?
September 22, 2012

calculusa) Sketch a curve whose slope is always positive and increasing. b) Sketch a curve whose slope is always positive and decreasing. c) Give equations for curves with these properties. So for a, I drew a positive slope that was concave up. And for b, I drew a slope that was ...
September 21, 2012

chemistryWater (H20) is a liquid at room temperature and atmospheric pressure whereas hydrogen sulfide (H2S) is a gas under the same conditions. Based on this information, what can you say about the intermolecular interactions in these two substances. So would this have to do with ...
September 16, 2012

ChemistrySpecify the number of core and valence electrons for Ti^2+ Can I just pretend that this ion is calcium and calculate the valence electrons that way? So 18 core, 2 valence?
September 15, 2012

ChemistryWrite the chemical symbol for the atomic species with 35 electrons and a charge of +34 on the nucleus. Does the +34 charge just mean the number of protons? And then 35 electrons would give it a - charge so it would be Se-? Or am I looking at this question wrong? Thanks!
September 15, 2012

chemistry"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth can cause DNA mutations. The highest ...
September 14, 2012

Chemistry"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth can cause DNA mutations. The highest ...
September 13, 2012

generalWhat are the various long-term and short-term impacts of food wastage? Please give answers from multiple area eg. cultural,social,economics etc. Global warming I have found out about it so please give a more insightful answe
April 2, 2012

chemistrythe thermite reaction was previously used to weld the rails of railroad tracks together. the reaction is: Fe2O3(s)+ 2Al(s)--> 2Fe(l)+ Al2O3(s) (2Fe and 3 oxygen) (2Al and 3 oxygen) what masses of iron(III) oxie and aluminum must be used to produce 15.0g of liquid iron? what...
January 12, 2012

ChemistryWhat happens in confirmatory test for bismuth? What happens in confirmatory test for copper? What happens in confirmatory test for arsenic? Please help! an you explain in detail. even a link explaining it would help
October 31, 2011

chemistryCalculate the activation energy (in Joules) for a reaction whose rate constant doubles when the temperature is raised from 298 K to 500 K. Take R to be 8.314 J/K-mol.
October 13, 2011

chemistryVery carefully, but breifly discuss, with specific example, Le Chatelier Principle and its relationship to common ion effect.
October 13, 2011

PhysicsHello, Steve. Thanks for help, but I'm sorry that your answer is incorrect. I had tried your answer， but it said incorrect.
October 4, 2011

PhysicsIn a scene in an action movie, a stunt man jumps from the top of one building to the top of another building 3.5 m away. After a running start, he leaps at an angle of 14 with respect to the flat roof while traveling at a speed of 5.6 m/s. The acceleration of gravity is 9...
October 4, 2011

mathBill purchased 4 pens for $3.32 including $.16 sales tax. FIND THE C COST OF ONE PEN. I need to write this in an equation. Then solve thats what the worksheet says.
February 17, 2011

MathI am a 5-digit whole number. I have 4 different digits. There are no 7s or 5s and I only have one 2. My hundreds digit is the least. My tens digit is odd and is the sum of all the other digits. What number could I be?
December 13, 2010

accountingIs it necessary for a finance manager to understand accounting if the firm has a professional accountant on staff and why?
January 2, 2010

FinanceDr. J. wants to buy a Dell computer which will cost $2,788 four years from today. He would like to set aside an equal amount at the end of each year in order to accumulate the amount needed. He can earn 7% annual return. How much should he set aside? A. $823.15 B. $531.81 C. $...
December 5, 2009

english Imagine you are on a local commission appointed to study the lack of proper recreation facilities for youth in your neighborhood. Decide what facilities should be recommended. Write an appropriate resolution to be presented to your county government. Remember to give the ...
October 26, 2009

governmentwrite several paragraphs stating advantages and disadvantages to the unitary, confederate, and federal systems of government.
October 26, 2009

Governmenthow could i explain the unitary, confederate, and federal systems of government in a five hundred word essay
October 7, 2009

ScienceName three different agents of erosion that might move a rock once it has been weathered?
March 5, 2008

LogicFor each of the following enthymemes, identify the premise(s) and the conclusion, and fill in any missing premises or missing conclusions. If possible, fill in what is missing in such a way as to make the arguments valid. It is possible that nothing exists. Therefore, there is...
February 8, 2008

HomeoworkI basically just have trouble staying focused and doing my homework, and often get discouraged when it looks long- how can I keep myself on track, because hw is my biggest issue? Go here , with your mom. http://www.pinkmonkey.com/electricdesk/elec-desk.asp Go thru the program ...
May 1, 2007

Germany and ChinaI need to know if Germany and China both have liability insurance and what does it cover? (need references) also driving under the influence/BAC and punishment for (both countries) are selt belts required for these countries? Thank you for using the Jiskha Homework Help Forum...
March 27, 2007

ChemistryI have this question in front of me concerning Methanol (CH3OH) & how geseous methanol is formed via the following thermochemical equation: CO(g)+2H2(g)¡êCH3OH(g)∆H=-90kJ . Now, it asks me (explanations should show a clear understanding of how Le Chatelier&...
February 7, 2007

DebateHello, I have to create a debate for my English class. I am debating a difficult topic, and I was hoping I could get some good ideas on where to start. My topic is that I have to prove that love is not nessicary for survival. Does anyone have any good ideas of how I could ...
February 4, 2007

mathConcrete can be purchased by the cubic yard. How much will it cost to pour a slab that is 17 ft by 17 ft by 2 ft if the concrete costs $40.00 per cubic yard?
December 17, 2006

Concentration increaseRf value is calculated by distance spot traveled divided by total distance of eluent. So if you increase polarity of eluent and the spot travels further than before, you will actually DECREASE Rf value.
October 22, 2006

BiologyCan anyone help me with this one question that I'm stumped on? The process by which a web-spinning spider makes a "sketch" of a web design before making a permanent web is called - A. lock-step sequence B. simulation C. trial and error D. cinch and attach Thanks ...
September 27, 2006

mathwhat do we call numbers that cannot be arranged into 2-row arrays? A matrix of order 2 x n. n is the number of entires in each row.
August 24, 2006

EnglishWhich of the following sentences has a compound predicate? A. She raced along the path to beat him to the beach. B. While he swam, she collected shells. C. She washed the shells and dried them in the sun. D. She placed the shells in a plastic bag while he dried himself off. ...
July 6, 2006